摘要
【目的】分析堵河源国家级自然保护区锐齿槲栎(Quercus aliena var.acutiserrata)群落乔灌草层优势种群的生态位特征,探究群落内各种群的资源利用状况及不同种群间的竞争与发展趋势。【方法】基于堵河源保护区1个100 m×100 m和3个30 m×30 m监测样地数据,采用生态位宽度、生态位相似性、生态位重叠度、生态响应及群落稳定性评价方法对锐齿槲栎群落乔灌草层优势物种生态位和群落稳定性进行分析。【结果】乔木层生态位宽度最大物种为四照花(Cornus kousa)(B_((L)i)=24.978),其次为锐齿槲栎(B_((L)i)=22.844);四照花与锐齿槲栎生态相似性最高(0.771);野漆(Toxicodendron succedaneum)(B_((L)i)=2.047)和大叶杨(Populus lasiocarpa)(B_((L)i)=2.713)的生态位宽度最小,但生态位重叠度(0.933)最高;米心水青冈(Fagus engleriana)种群是乔木层发展能力最强种群。灌木层桦叶荚蒾(Viburnum betulifolium)生态位宽度最大(B_((L)i)=20.257),其次为四照花(B_((L)i)=19.838);米心水青冈和猫儿刺(Ilex pernyi)幼树的生态位相似性(0.809)和生态位重叠度(0.916)最大。草本层中日金星蕨(Parathelypteris nipponica)生态位宽度(B_((L)i)=18.680)最大,其次为鹿蹄草(Pyrola calliantha)(B_((L)i)=14.575),二者的生态相似性最高(0.647);锐齿槲栎幼苗对资源的占用量和生态响应速率较低,发展力较低;群落乔灌草层稳定性均较高。【结论】锐齿槲栎更新和发展力较弱,未来可能被米心水青冈替代。可适当进行人为干扰或调整环境资源,释放优势种群一定的资源空间,以提高物种多样性并维护锐齿槲栎群落稳定。
【Objective】The goal of this study was to analyze the niche characteristics of dominant populations in the tree-shrub-grass Layer of Quercus aliena var.acutiserrata community in Duheyuan National Nature Reserve and to examine the resource utilization status of various populations in the community as well as the competition and development trends among different populations.【Method】The niche width,niche similarity,niche overlap,ecological response,and community stability were used to evaluate the arbor,shrub,and herb of the community,and community stability of different layers were analyzed based on the data of one 100 m×100 m monitoring plot and three adjacent smaller plots ench 30 m×30 m in size in the Duheyuan Reserve.【Result】Cornus kousa(B_((L)i)=24.978)had the largest niche breadth in the arbor layer,followed by Quercus aliena var.acutiserrata(B_((L)i)=22.844).Quercusaliena var.acutiserrata and Cornus kousa had the highest ecological similarity(0.771);Toxicodendron succedaneum(B_((L)i)=2.047)and Populus lasiocarpa(B_((L)i)=2.713)had the smallest niche width,but the highest niche overlap(0.933);Fagus engleriana population had the strongest development ability in arbor layer.Viburnum betulifolium had the widest niche in the shrub layer(B_((L)i)=20.257),followed by Cornus kousa saplings(B_((L)i)=19.838);the niche similarity(0.809)and niche overlap(0.916)of Fagus engleriana and Ilex pernyi were the greatest.Parathelypteris nipponica had the largest niche breadth(B_((L)i)=18.680)in the herb layer,followed by Pyrola calliantha(B_((L)i)=14.575),and the two species had the highest ecological similarity(0.647);the seedlings of Quercus aliena var.acutiserrata had lower resource occupancy and ecological response rate,as well as lower development ability in the herb layer;the community s different layers were then highly stable.【Conclusion】The regeneration and development of Quercus aliena var.acutiserrata were poor,and it may be replaced by Fagus engleriana in the future.Appropriate human disturbance or
作者
蔡京勇
郑德国
罗刚
万丹
秦汉
汪洋
CAI Jingyong;ZHENG Deguo;LUO Gang;WAN Dan;QIN Han;WANG Yang(School of Landscape and Architecture,Hubei Ecology Polytechnic College,Wuhan 430200,China;Management Office of Duheyuan Nature Reserve,Shiyan 442200,China;Suixian Forestry Bureau,Suizhou 441304,China)
出处
《湖南生态科学学报》
CAS
2023年第1期44-54,共11页
Journal of Hunan Ecological Science
基金
湖北省林业局2020年科技支撑计划项目([2020]LYKJ03)
中德财政合作林业重大研究项目(zdczhz2021ky09)。
关键词
生态位
优势种
群落稳定性
锐齿槲栎群落
堵河源国家级保护区
niche
dominant species
community stability
Quercus aliena var.acutiserrata community
Duheyuan National Nature Reserve
